Swollen lymph nodes, also known as lymphadenopathy, are typically caused by an immune response to an infection from bacteria or viruses. The lymph nodes, which act as filters, trap viruses, bacteria, and other causes of illnesses before they can infect other parts of the body. Common areas where swollen lymph nodes might be noticed include the neck, under the chin, in the armpits, and in the groin. Infections such as abscessed or impacted tooth, ear infection, colds, flu, mononucleosis, and sexually transmitted illnesses are common causes of swollen lymph nodes. Additionally, immune or autoimmune disorders, certain medications, and cancers can also lead to swollen lymph nodes. Its important to note that swollen lymph nodes are a sign that something is wrong somewhere in the body, and they usually return to normal size when their job of fighting off the infection is done. However, in rare cases, swollen lymph nodes can be caused by cancer.
In summary, swollen lymph nodes are primarily caused by the bodys immune response to infections, but they can also be a sign of more serious conditions such as cancer. If swollen lymph nodes persist or enlarge for no apparent reason, it is advisable to seek medical attention for further evaluation and potential testing.
